Posted by Matt on .
I have no idea how to solve this problem.
<A is in standard position on a unit circle. Point P (1/2, √3/2) is the point of intersection of its terminal side with the unit circle. Find the measure of <A in radians.

trig 
Allan,
Since the angle in in QIII, use the cos= 1/2 and sin= sqrt3/2 and the inverse tan function on your calculator since tan is the y/x and is equal to sqrt3. angle is 60